Johnny was at the Tapout shop last summer for us to complete a Purple Belt Performance Package on his ATS-V. At that time we noticed that power dropped off pretty hard on the top end. We’ve seen this before and it’s a tell tale sign of weak valve springs. We reduced his RPM to eliminate any unnecessary strain and his car still made excellent power.

Fast-forward to this summer and Johnny was back to upgrade to the Mace Stage 1 camshafts and valve springs. Peak power increased by 12 whp and top end power gains were HUGE at 79 whp! Not only that, it was 102 degrees in the shop when we completed this dyno tuning.

This customer purchased a super clean 2016 ATS-V that already had Purple Belt equivalent parts installed, but because he didn’t know a lot of the history on the car, he wanted to have us check things over and give it a fresh dyno tune.

He drove all the way to Ohio from Virginia so he could get Jorge’s magic ATS-V touch! After a fresh set of spark plugs and strapping it down to the dyno, it put down a solid 602 whp on E65 fuel. While he’s no stranger to horsepower having several V8s already in his stable, this ATS-V still packs a big punch on the streets!

This customer is a good friend of ours and ever since they picked up their wicked clean ATS-V they’ve felt the need for speed! While keeping the exterior completely flawless, he’s also been going at a rate of one Performance Package a year. And that’s a good pace to keep!

He had us install the Mace Stage 1 cams and springs last fall so this summer it was time to make the full leap to Brown Belt with a set of Pure Stage 2 Plus turbos. Our V-Series Cadillac Guru Jorge was on the job and a few days later it was time to get this ATS-V strapped to the dyno. After completing a custom Flex Fuel Tune, we got to work on the Kill Tune and this thing is KICKING ASS. It’s putting down 751 whp / 726 wtq and it absolutely rips!

Not only that, we capped wastegate duty cycle at 85% since he is still running stock injectors and is not running methanol injection. We could push these turbos further, but we’re tuning for performance AND reliability.

This customer from Maryland loves driving his cars and his M6 CT4-V Blackwing is no exception. With nearly 80,000 miles on the clock, this is certainly one of the higher mileage Blackwing’s that we’ve seen.

He completed our Blue Belt Performance Package installation as well as Swift Springs in his garage at home, but wanted to make a visit to the shop to get it strapped down to our dyno. With EPA catted downpipes, this CT4-V Blackwing put down 492 whp and 492 wtq! That’s quite an impressive combination for a car and no doubt has made his travels far more exciting!

And did we mention he wasn’t a fan of the downpipes installation? The way his gloves landed after he finished the job and tossed them down says it all!

This customer wanted to crank up the power on his low mileage ATS-V A8 coupe. With only spark plugs, Gigs ported throttle body and EPA catted downpipes, final Dyno numbers were 502 whp!

That’s impressive considering the minimal mods and the fact that he is running catted downpipes. We know these power gains will certainly make a huge difference on the street!